Pristimantis thyellus

Pristimantis thyellus is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Pristimantis thyellus faces severe threats from ongoing deforestation and agricultural expansion within its extremely limited range in the Cordillera Oriental of Colombia. The species' restriction to high-elevation cloud forests makes it particularly vulnerable to climate change impacts, as warming temperatures force suitable habitat upslope with nowhere left to retreat. Mining activities and infrastructure development in the region pose additional pressures on the remaining forest fragments where this endemic frog persists.

Pristimantis thyellus occurs in Venezuela. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.

The main threats to Pristimantis thyellus are 11.1, ai-1, ai-2, and ai-3. The full IUCN-classified threat record for this species is detailed on the species page.